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| CONST K_Entete = 54; Dim_Max = 1500;
Chemin = 'D:\ZZZZZZ\#\';
TYPE Pixel = ARRAY[1..3] OF Byte;
Tab_Pix = ARRAY[0..Dim_Max, 0..Dim_Max] OF Pixel;
VAR Larg_Image, Haut_Image, T_Fichier, T_Image: Z_32; // Z_32 = LongInt
... / ...
Matrice_1, Matrice_2: Tab_Pix;
... / ...
(*HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH
Calcul de la seconde matrice
HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH*)
// Calcul des valeurs extrêmes des coordonnes
PROCEDURE Calc_XiYi(La, Ha, Xp, Yp: Z_32;
VAR Xmin, Xmax, Ymin, Ymax: Z_32);
VAR X1, X2, Y1, Y2: Z_32;
BEGIN
X1:= Xp - 1; IF (X1<0) THEN X1:= 0; Xmin:= X1;
X2:= Xp + 1; IF (X2>=La) THEN X2:= La - 1; Xmax:= X2;
Y1:= Yp - 1; IF (Y1<0) THEN Y1:= 0; Ymin:= Y1;
Y2:= Yp + 1; IF (Y2>=Ha) THEN Y2:= Ha - 1; Ymax:= Y2
END;
TYPE Tab_3R = ARRAY[0..2] OF Reel;
Tab_TrR = ARRAY[0..Dim_Max, 0..Dim_Max] OF Tab_3R;
VAR Lst3R: Tab_3R;
MatTr: Tab_TrR;
(*HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH
Calcul de la matrice de triplets
HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH*)
CONST C0 = 100; C1 = 37; C2 = 14;
C: ARRAY[0..2] OF Byte = (C0, C1, C2);
Sc1 = 4 * (C1 + C2); ScMax = C0 + Sc1;
// Calcul des triplets représentant la matrice de Harris
FUNCTION F_TabH(La, Ha, x, y: Z_32): Tab_3R;
CONST Tzero: Tab_3R = (0, 0, 0);
VAR i: Byte; D2, Ix, Iy, s, Sc, Sh, Sx, Sy, X1, X2, Y1, Y2: Z_32;
q: Reel; Th, Tx: Tab_3R;
BEGIN
Calc_XiYi(Larg_Image, Haut_Image, x, y, X1, X2, Y1, Y2);
Sc:= 0; Tx:= Tzero;
FOR Ix:= X1 TO X2 DO
BEGIN
Sx:= Abs(Ix - x);
FOR Iy:= Y1 TO Y2 DO
BEGIN
Sy:= Abs(Iy - y); s:= Sx + Sy; Inc(Sc, C[s]);
FOR i:= 0 TO 2 DO IncR(Tx[i], C[s] * MatTr[Ix, Iy][i])
END
END;
q:= ScMax / Sc; FOR i:= 0 TO 2 DO Th[i]:= q * Tx[i];
Result:= Th
END;
(*HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH
Calcul des triplets d'entiers
HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH*)
FUNCTION Int_Px(Px: Pixel): Z_32; // Intensit du pixel
VAR s: Z_32;
BEGIN
s:= Sqr(Px[1]); Inc(s, Sqr(Px[2])); Inc(s,Sqr(Px[3]));
Result:= s
END;
// Calcul de la matrice (2x2) locale ramenée
un triplet
FUNCTION F_MatP(x, y: Z_32): Tab_3R;
VAR DxI, DyI, Q2sDx, Q2sDy, X1, X2, Y1, Y2, z: Z_32; Ta: Tab_3R;
BEGIN
Calc_XiYi(Larg_Image, Haut_Image, x, y, X1, X2, Y1, Y2);
Q2sDx:= 2 DIV (X2 - X1); Q2sDy:= 2 DIV (Y2 - Y1);
z:= Int_Px(Matrice_1[X2, y]); Dec(z, Int_Px(Matrice_1[X1, y]));
DxI:= z * Q2sDx;
z:= Int_Px(Matrice_1[x, Y2]); Dec(z, Int_Px(Matrice_1[x, Y1]));
DyI:= z * Q2sDy;
Ta[0]:= Sqr(DxI); Ta[2]:= Sqr(DyI);
Ta[1]:= DxI * DyI; Result:= Ta
END;
// Calcul de la matrice de triplets
PROCEDURE Calc_MatTr(La, Ha: Z_32; VAR M_Tr: Tab_TrR);
VAR Xm, Ym: Z_32;
BEGIN
FOR Xm:= 0 TO (La - 1) DO
FOR Ym:= 0 TO (Ha - 1) DO
M_Tr[Xm, Ym]:= F_MatP(Xm, Ym)
END;
// Valeurs extrêmes de la grandeur locale (r)
PROCEDURE Calc_RminRmax(La, Ha: Z_32; VAR R_min, R_max: Reel);
VAR Xm, Ym: Z_32; Det, p, q, r, Rmax, Rmin: Reel; Th: Tab_3R;
BEGIN
Rmax:= 0; Rmin:= 0;
FOR Xm:= 0 TO (La - 1) DO
FOR Ym:= 0 TO (Ha - 1) DO
BEGIN
Th:= F_TabH(La, Ha, Xm, Ym);
p:= Th[0] * Th[2]; q:= Sqr(Th[1]);
Det:= p - q; q:= Th[0] + Th[2];
IF (q=0) THEN r:= 0 ELSE r:= Det / q;
IF (Rmax<r) THEN Rmax:= r;
IF (Rmin>r) THEN Rmin:= r;
END;
R_min:= Rmin; R_max:= Rmax
END;
// Affichage des valeurs extrêmes
PROCEDURE Aff_F_Rminmax(F_, Min, Max: Reel);
CONST v = 11;
BEGIN
E(0015); Wt(4, 40, 'Fr = '); E(0012); Write(F_:6:4);
E(0015); Write(' Rmin = '); E(0010); Write(Min:v);
E(0015); Write(' Rmax = '); E(0010); Write(Max:v)
END;
(*HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH*)
PROCEDURE ZeroM(VAR Ma: Tab_Pix); // Mise
zro
CONST Pzero: Pixel = (0, 0, 255);
VAR i, j: Z_32;
BEGIN
FOR i:= 0 TO Dim_Max DO
FOR j:= 0 TO Dim_Max DO Ma[i, j]:= Pzero
END;
// Calcul de la matrice du corps de la seconde image
PROCEDURE Calc_Mat_Im2(La, Ha: Z_32; VAR Ma1, Ma2: Tab_Pix);
CONST m = 255; Fr = 0.001;
P000: Pixel = (0, 0, 0);
P100: Pixel = (m, 0, 0);
P001: Pixel = (0, 0, m);
P101: Pixel = (m, 0, m);
P110: Pixel = (m, m, 0);
VAR Xm, Ym: Z_32; Det, p, q, r, Rm1, Rm2, Rmax, Rmin: Reel;
Th: Tab_3R; Px: Pixel;
BEGIN
Calc_MatTr(Larg_Image, Haut_Image, MatTr);
Calc_RminRmax(Larg_Image, Haut_Image, Rmin, Rmax);
Aff_F_Rminmax(Fr, Rmin, Rmax);
Rm1:= Fr * Rmax; Rm2:= Fr * Rmin;
ZeroM(Matrice_2);
FOR Xm:= 0 TO (La - 1) DO
FOR Ym:= 0 TO (Ha - 1) DO
BEGIN
Th:= F_TabH(La, Ha, Xm, Ym);
p:= Th[0] * Th[2]; q:= Sqr(Th[1]);
Det:= p - q; q:= Th[0] + Th[2];
IF (q=0) THEN r:= 0 ELSE r:= Det / q;
IF (r>Rm1) THEN Px:= P101
ELSE IF (r<Rm2) THEN Px:= P101
ELSE Px:=Ma1[Xm, Ym];
Ma2[Xm, Ym]:= Px
END
END; |
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